From the FAQ at Astrodienst:

"This is what astrology can offer you

    * a deeper understanding of yourself, your partner, your child ...
    * clues on your strengths and weaknesses, on challenges and chances in your life ...
    * a closer look at life cycles and topics which are relevant at a certain point in your life ...


Astrology cannot

    * take decisions for you ...
    * tell you whether or not you should get married, are with the right partner or will win the lottery ...
    * know the environment you live or grew up in, the circumstances of your life ...
    * forecast events in the future ..."

Got that last one, folks? Please, read it over and over till it finally sinks in. And remember it next time you come across a "scientific study" (???) attempting to prove or disprove the 'predictiveness' (???) of a natal chart or astrology in general.